25239513 has 16 divisors (see below), whose sum is σ = 37222976. Its totient is φ = 15111360.

The previous prime is 25239493. The next prime is 25239523. The reversal of 25239513 is 31593252.

It is not a de Polignac number, because 25239513 - 2⁹ = 25239001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25239523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7303 + ... + 10188.

It is an arithmetic number, because the mean of its divisors is an integer number (2326436).

Almost surely, 2^25239513 is an apocalyptic number.

It is an amenable number.

25239513 is a deficient number, since it is larger than the sum of its proper divisors (11983463).

25239513 is a wasteful number, since it uses less digits than its factorization.

25239513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17544.

The product of its digits is 8100, while the sum is 30.

The square root of 25239513 is about 5023.8942066887. The cubic root of 25239513 is about 293.3325945516.

It can be divided in two parts, 25239 and 513, that added together give a palindrome (25752).

The spelling of 25239513 in words is "twenty-five million, two hundred thirty-nine thousand, five hundred thirteen".